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Absolutely basic Java question which I'm having a hard time finding on Google. What does the following mean:
(7 & 8) == 0?
Is that equivalent to writing:
7 == 0 || 8 == 0?
I wrote a quick main which tests this, and it seems to be the case. I just wanted to make sure I'm not missing anything.
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How to use the logical OR operator. We use the symbol || to denote the OR operator. This operator will only return false when both conditions are false. This means that if both conditions are true, we would get true returned, and if one of both conditions is true, we would also get a value of true returned to us.
Logical expressions are also known as Boolean expressions . It will always evaluate to a value of either true or false. Therefore, they will be represented by the data type boolean. While they may seem similar to mathematical operators, the difference lies in how they are used with comparative or boolean operators.
The && and || operators perform Conditional-AND and Conditional-OR operations on two boolean expressions. These operators exhibit "short-circuiting" behavior, which means that the second operand is evaluated only if needed.
&& is a type of Logical Operator and is read as “AND AND” or “Logical AND“. This operator is used to perform “logical AND” operation, i.e. the function similar to AND gate in digital electronics.
Nope. & is bitwise and. It sets a bit if the corresponding bits are set in both inputs. Since in binary, 7 is 111 and 8 is 1000, they have no bits in common, so the result is 0.
There isn't really any shorthand syntax for the thing you suggest, not on a single line. There are a few workarounds -- test for membership in a Set or BitSet, use a switch statement -- but nothing that's both as efficient and as short as just 7 == 0 || 8 == 0.
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